Hi AeroQuad forum.
Today I decided to give the AeroQuad software a try and therefor connected the Sparkfun 9DOF IMU board I've got to my Arduino MEGA 1280 board (with the logic level converter board of course).
I then uploaded the firmware to the board and were able to calibrate the board and see the 3D representation fine :-)
All good so far. So I decided to connect only two of the 4 ESC's to test the board and then I wasn't able to connect to it, not in the configurator nor using a simple terminal writing "#".
If I disconnected the ESCs it worked again - wtf.?
I only connected Ground and PWM signal to the ESCs, though I've also tried with all of them including 5V. I also tried powering the Arduino thru Vin from the LiPo battery - nor did that work.
Then I thought I would try to use a Bluetooth serial module so the USB Cable wasn't connected and could interfear on the power supply in any way.
At first it did work in the serial terminal. Now I was able to get a reply when writing "#". But unfortunately it didn't work in the configurator - WHY? :O
Then I thought of other opportunities and remembered a serial bridging application, creating a virtual serial port bridging it to a physical one.
And that worked! I was finally able to control the board with the ESCs connected.
But now to the fun and wierd part
I have changed the PWM frequency to 50Hz because I don't think the Turnigy Plush 30A can accept the high 300Hz signal - it didn't work with that.
But even with the 50Hz signal I can't calibrate them using the ESC calibration method. But if I go into the Motor control panel, set the throttle to max, connect power, and set throttle to minimum, it somewhat works -> but no high speeds at all!?
By measuring the signal with a scope I can see that the width goes from 1ms (low) to 1.2ms (high) - not 2ms as it was supposed to be. Even if I set the value in between it is still only 1.2ms.
Do you have any idea of this?
Thank you very much in regards.